Perhaps you should try some spelling variations:
1.4 communication » 5.4 communication, 1.1 communication, 1.3 communication
developpement de » developpement des, developpement durable
4 developpement » de developpement, le developpement, et developpement
inflation debt » inflation der, inflation seit, inflation pt
debt price » debt service, debt profile
price 1.4 » price 11.4, price 4.4, price 1.3
costs 4 » costs _, costs a, costs 4.2

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology _ inflation debt price 1.4 communication costs 4 developpement de l'afrique.*.